<template>
  <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
    <template v-slot:right>
      <a @click="toggle(-1)" :class="{disabled:index==0}" href="javascript:;" class="iconfont icon-angle-left prev"></a>
      <a @click="toggle(1)" :class="{disabled:index==1}" href="javascript:;" class="iconfont icon-angle-right next"></a>
    </template>
    <div ref="target" class="box">
    <transition name="fade">
      <ul v-if="brands.length" class="list" :style="{transform:`translateX(${-index*1240}px)`}">
        <li v-for="item in brands" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
          </RouterLink>
        </li>
      </ul>
           <div v-else class="skeleton">
          <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px" height="305px"/>
        </div>
        </transition>
    </div>
  </HomePanel>
</template>

<script>
import {ref} from 'vue'
import HomePanel from './home-panel'
import { findBrand } from '@/api/home'
import { useLazyData } from '@/hooks'
export default {
  name: 'HomeBrand',
  components: { HomePanel },
  setup(){
      //获取数据
    //   const brands=ref([])
    //   findBrand(10).then(data=>{
    //       brands.value=data.result
    //   })
    //uselazydata需要的是api函数，如果遇到传参的情况，自己写函数在函数中调用API
    const {target,result}=useLazyData(()=>findBrand(10))
      //切换效果 ，前提只有0 1两页
      const index =ref(0)
      //1.点击上一页 

      //2.点击下一页
      const toggle =(step)=>{
          const newIndex=index.value+step
          if (newIndex<0 || newIndex>1) return
          index.value=newIndex
      }
     
      return {brands: result,toggle,index,target}
  }
}
</script>

<style scoped lang='less'>
 .skeleton {
    width: 100%;
    display: flex;
    .item {
      margin-right: 10px;
      &:nth-child(5n) {
        margin-right: 0;
      }
    }
  }
.home-panel {
  background:#f5f5f5
}
.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;
  &::before {
    font-size: 12px;
    position: relative;
    top: -2px
  }
  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}
.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;
  .list {
    width: 200%;
    display: flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n) {
        margin-right: 0;
      }
      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>
